Newark, Texas. Newark is a city in Tarrant and Wise counties in the U.S. state of Texas. The population was 1,005 at the 2010 census. Contents.
Overview. The differences between vascular and non-vascular plants are clear: vascular plants have a vascular system that transports water and minerals, and non-vascular plants don't. However, there are many important similarities between the two groups.
Vascular Tone. Vascular tone refers to the degree of constriction experienced by a blood vessel relative to its maximally dilated state. All arterial and venous vessels under basal conditions exhibit some degree of smooth muscle contraction that determines the diameter, and hence tone, of the vessel. Basal vascular tone differs among organs.